Troubleshooting
Moonflower problems — and how to fix them
Moonflower (Ipomoea alba) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Poor or absent flowering
Almost always caused by excess nitrogen, insufficient sun, or soil that is too rich. Switch to a low-nitrogen fertiliser and ensure a minimum of 6 hours of direct sun.
Root rot
Overwatering or heavy, poorly drained soil causes wilting and stem collapse at the base. Ensure sharp drainage and allow the soil surface to dry slightly between waterings.
Aphids and whitefly
Young tender growth attracts aphid colonies and whitefly, especially in warm, sheltered spots. Knock off with a strong water jet or apply insecticidal soap; encourage ladybirds as natural predators.
Prevent moonflower problems before they start
Most moonflower issues are care-mismatch, not bad luck. Dial in the basics:
Looking for moonflower in general rather than its problems? Read the full moonflower care guide — light, water, soil and feeding.
Moonflower problems — FAQ
Why is my moonflower poor or absent flowering?
Almost always caused by excess nitrogen, insufficient sun, or soil that is too rich. Switch to a low-nitrogen fertiliser and ensure a minimum of 6 hours of direct sun.
Why is my moonflower root rot?
Overwatering or heavy, poorly drained soil causes wilting and stem collapse at the base. Ensure sharp drainage and allow the soil surface to dry slightly between waterings.
Why is my moonflower aphids and whitefly?
Young tender growth attracts aphid colonies and whitefly, especially in warm, sheltered spots. Knock off with a strong water jet or apply insecticidal soap; encourage ladybirds as natural predators.